Asher Roth's unpretentious rap act makes it impossible to stuff him into any pigeonhole. Coming out of Pennsylvania pegged as the next Eminem minus the anger, he shook that albatross, as well as the impression of being a perennial undergrad, by applying his every-bro flow to a variety of musical styles—from piano-powered pop to drum-driven disco to his own soul-sampling rap cuts. Watching him evolve from freshman freak to canny adult rapper fluent in TED Talks is like reliving one's own maturation, and is central to Roth's appeal, as is his endlessly chillaxed approach to crafting modern beat-driven pop.